Grok Mini-HowTos

These mini-tutorials have been contributed by members of the Grok community.

• Permissions Tutorial:

  Zope3 and Grok come with authorization capabilities out of the box. While a vanilla Zope3 application protects all content by default and performs authorization checks on the content objects themselves, Grok allows access to everything unless you explicitly restrict it. The authorization checks here are done based on the Views used to access (display/manipulate) the content.

  Author: Luis De la Parra; Uli Fouquet; Jan-Wijbrand Kolman

• Search Tutorial:

  Grok supports the vanilla indexing services available in Zope 3 straight out of the box. The catalog uses developer-defined indexes for searching. In other words, you have to define the indexes you want to use to search you objects before you perform the actual search.

  Author: Sebastian Ware

• Macros With Grok:

  Macros are a way to define a chunk of presentation in one template, and share it in others. Changes to the macro are immediately reflected in all templates, that use it.

  Author: Uli Fouquet

• XMLRPC With Grok:

  XMLRPC (http://xmlrpc.com) is a spec and a set of implementations that allow software running on disparate operating systems, running in different environments to make procedure calls over the Internet.

  Author: Kushal Das

• Navigating To Transient Objects Tutorial:

  Sometimes you need to create objects that do not persist in the ZODB. For the purpose of this tutorial, we are going to call all such objects transient objects. This highlights the fact that, from the point of view of Grok, they are going to be instantiated on-the-fly as a user visits them.

  Author: Brandon Craig Rhodes

• REST With Grok:

  REST is a way to build web services, i.e. a web application where the user is another computer, not a human being. REST takes the approach to make the web service look very similar to a normal web application, using well-known semantics of HTTP.

  Author: Martijn Faassen

• Pluggable template laguanges:

  Grok, like the Zope 3 framework on which it is built, uses Zope Page Templates as its default templating language. While you can, of course, use whatever templating language you want in Grok by calling it manually, you can also ?plug in? a template language such that both inline templates and templates stored in files are automatically linked with your Views ? just like inline grok.PageTemplates and files with the .pt extension are by default.

  Author: Lennart Regebro